Journal of energy storage最新文献_第3页

Facile construction of nickel cobalt boride and layered Ti-MXene heterostructure as high-energy-density electroactive materials of supercapacitors

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-17 DOI: 10.1016/j.est.2025.115856

Fu-Sen Chen , Zhi-Xiang Jin , Mani Sakthivel , Lu-Yin Lin , Kuo-Chuan Ho

Transition metal boride (TMB) is considered as a promising battery-type material of supercapacitors (SCs), owing to abundant electrochemically active sites, strong electrical conductivity, high chemical and thermal stability, and high theoretical capacity. However, serious aggregations of TMB substantially reduces structural stability and electrochemical performance. A conductive support is required to improve TMB dispersion and promote energy storage ability. In this study, a basic wet chemical reduction method is utilized to synthesize cobalt boride (CoB), nickel boride (NiB), and nickel cobalt boride (NiCoB) as battery-type materials of SCs. The NiCoB presents superior electrochemical results due to the highest theoretical capacity and abundant redox states of Ni and Co. Two-dimensional titanium carbide (MXene) is further incorporated in NiCoB (NiCoB/MXene), which demonstrates a significant specific capacity of 1240 C g⁻¹ at 1 A g⁻¹ and an outstanding rate capability of 73.9% (916 C g⁻¹ at 40 A g⁻¹), attributing to higher conductivity, enhanced dispersion of NiCoB on MXene, and synergistic effects from capacitive MXene and redox active NiCoB. A hybrid SC assembled by NiCoB/MXene and activated carbon electrodes delivers a maximum energy density of 80.5 W h kg⁻¹ at 850 W kg⁻¹, and maintains a high capacitance retention of 83.4% over 20,000 cycles.

{"title":"Facile construction of nickel cobalt boride and layered Ti-MXene heterostructure as high-energy-density electroactive materials of supercapacitors","authors":"Fu-Sen Chen , Zhi-Xiang Jin , Mani Sakthivel , Lu-Yin Lin , Kuo-Chuan Ho","doi":"10.1016/j.est.2025.115856","DOIUrl":"10.1016/j.est.2025.115856","url":null,"abstract":"<div><div>Transition metal boride (TMB) is considered as a promising battery-type material of supercapacitors (SCs), owing to abundant electrochemically active sites, strong electrical conductivity, high chemical and thermal stability, and high theoretical capacity. However, serious aggregations of TMB substantially reduces structural stability and electrochemical performance. A conductive support is required to improve TMB dispersion and promote energy storage ability. In this study, a basic wet chemical reduction method is utilized to synthesize cobalt boride (CoB), nickel boride (NiB), and nickel cobalt boride (NiCoB) as battery-type materials of SCs. The NiCoB presents superior electrochemical results due to the highest theoretical capacity and abundant redox states of Ni and Co. Two-dimensional titanium carbide (MXene) is further incorporated in NiCoB (NiCoB/MXene), which demonstrates a significant specific capacity of 1240 C g<sup>−1</sup> at 1 A g<sup>−1</sup> and an outstanding rate capability of 73.9% (916 C g<sup>−1</sup> at 40 A g<sup>−1</sup>), attributing to higher conductivity, enhanced dispersion of NiCoB on MXene, and synergistic effects from capacitive MXene and redox active NiCoB. A hybrid SC assembled by NiCoB/MXene and activated carbon electrodes delivers a maximum energy density of 80.5 W h kg<sup>−1</sup> at 850 W kg<sup>−1</sup>, and maintains a high capacitance retention of 83.4% over 20,000 cycles.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115856"},"PeriodicalIF":8.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D binderless CuMoOx ceramic bimetallic oxides based microsupercapacitors with tailorable performance manufactured by one-step direct electric discharge writing

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-17 DOI: 10.1016/j.est.2025.115858

Ri Chen , Zehan Xu , Yunying Xu , Zhenhao Tao , Mingyi Jiang , Igor Zhitomirsky , Dawei Liu , Jian Wang , Junfeng He , Yong Yang , Haiyan Huang , Wenxia Wang , Kaiyuan Shi

Due to their advantageous electronic structures, vacancies, and synergistic effects, ceramic bimetallic oxides demonstrate great potential for microsupercapacitor (MSC) applications. Scalable and controllable synthesis of bimetallic oxides with exceptional capacitive performance remains a challenging task. In this work, 3D binderless CuMoO_x ceramic microsupercapacitors (CuMoMSC) with tailorable shapes are produced using direct electric discharge writing (DEDW) with facile computer-aided design. The important finding is that the electrochemical performance of CuMoMSC could be directly adjusted by the DEDW machining parameter of pulse width for the first time. Moreover, it is interesting to find the composition of the machining electrode materials could be tailored by the material of cutting tool via DEDW, opening a new way for customizing the electrochemical performance of MSCs. The manufactured 3D CuMoMSC exhibits a capacitance of 46.2 mF cm⁻² at 1 mV s⁻¹, and it retained 7.3 mF cm⁻² at super-high scan rate of 10 V s⁻¹, and possessed a good cycling stability of 97.6 % (2000 cycles), which was beneficial from the synergistic effects of bimetallic oxides and the introduction of oxygen vacancies. The results of this investigation manifest the wide range of possibilities for utilizing the DEDW technique in automatically manufacturing various ceramic bimetallic oxides with customized structure for various applications, such as catalysts, MSC and batteries.

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引用次数: 0

Experimental approaches for characterization of water-hydrogen flow in reservoir rock

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-17 DOI: 10.1016/j.est.2025.115785

Hyunbin Kim , Shirui Ding , Nikita Bondarenko , Donna C. Willette , Shadi Salahshoor , Roman Y. Makhnenko

Subsurface hydrogen (H₂) storage has emerged as a promising solution for overcoming challenges in renewable energy generation. The feasibility of geologic hydrogen storage in saline aquifers requires a comprehensive analysis of multiphase fluid flow within reservoir formations. This study investigates the water-hydrogen transport properties of homogeneous quartz-arenite Berea sandstone and heterogeneous Ironton/Galesville containing clay-rich bedding planes. An experimental setup is introduced to measure the intrinsic and water-hydrogen relative permeability under representative in-situ stress conditions. Single-phase flow tests reveal the bedding-normal intrinsic permeability of Ironton/Galesville to be ⁓10⁻¹⁷ m² – three to four orders of magnitude lower than the one measured for bedding-parallel orientation and Berea sandstone. In the two-phase flow tests, hydrogen exhibits significantly lower relative permeability than water primarily due to its lower viscosity. Hysteresis in relative permeability is observed only in primary episode, disappearing for the consecutive drainage and imbibition cycles. The strongest hysteresis is identified in vertical Ironton/Galesville, attributed to pore structure complexity and variation in capillary responses. Comparison with relative permeability estimation based on pore structure analysis underscores the limitation of such methods and highlights the importance of direct measurements. These findings provide critical insights into water-hydrogen flow mechanisms and offer valuable data for evaluating subsurface hydrogen potential.

{"title":"Experimental approaches for characterization of water-hydrogen flow in reservoir rock","authors":"Hyunbin Kim , Shirui Ding , Nikita Bondarenko , Donna C. Willette , Shadi Salahshoor , Roman Y. Makhnenko","doi":"10.1016/j.est.2025.115785","DOIUrl":"10.1016/j.est.2025.115785","url":null,"abstract":"<div><div>Subsurface hydrogen (H<sub>2</sub>) storage has emerged as a promising solution for overcoming challenges in renewable energy generation. The feasibility of geologic hydrogen storage in saline aquifers requires a comprehensive analysis of multiphase fluid flow within reservoir formations. This study investigates the water-hydrogen transport properties of homogeneous quartz-arenite Berea sandstone and heterogeneous Ironton/Galesville containing clay-rich bedding planes. An experimental setup is introduced to measure the intrinsic and water-hydrogen relative permeability under representative in-situ stress conditions. Single-phase flow tests reveal the bedding-normal intrinsic permeability of Ironton/Galesville to be ⁓10<sup>−17</sup> m<sup>2</sup> – three to four orders of magnitude lower than the one measured for bedding-parallel orientation and Berea sandstone. In the two-phase flow tests, hydrogen exhibits significantly lower relative permeability than water primarily due to its lower viscosity. Hysteresis in relative permeability is observed only in primary episode, disappearing for the consecutive drainage and imbibition cycles. The strongest hysteresis is identified in vertical Ironton/Galesville, attributed to pore structure complexity and variation in capillary responses. Comparison with relative permeability estimation based on pore structure analysis underscores the limitation of such methods and highlights the importance of direct measurements. These findings provide critical insights into water-hydrogen flow mechanisms and offer valuable data for evaluating subsurface hydrogen potential.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115785"},"PeriodicalIF":8.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of thermal efficiency of solar-assisted backfill coupled heat exchanger with seasonal heat storage system

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-17 DOI: 10.1016/j.est.2025.115809

Yujiao Zhao , Xueying Lu , Lang Liu , Bo Zhang , Rui Zhan , Mengyao Wang , Hailong Zhang , Dachuan Lu

The swift consumption of non-renewable resources like fossil fuels underscores the importance of renewable energy development for the sake of long-term sustainability. The mining area is rich in solar and geothermal energy resources. This study introduces a solar-assisted backfill coupled heat exchanger system with a seasonal heat storage system (SABCHE-SHS) as a sustainable energy solution, which stores abundant solar energy in the pre-set mine backfill body, aiming to achieve heat storage in the backfill body during the non-heating period and heat extraction during the heating period. This study employed numerical simulation methods to compare the long-term performance of the SABCHE-SHS with that of the backfill coupled heat exchanger system (BCHE) relying solely on geothermal energy over a decade. The results show that the SABCHE-SHS had good heat storage and heat extraction performance, high outlet water temperature, and maintaining stable annual heat transfer efficiency under multi-cycle operation. By year ten, the SABCHE-SHS can provided higher heat storage and extraction rates of 747.34 W and 987.85 W, respectively, which are 286.34 W and 232.87 W higher than those of the BCHE. The initial outlet water temperature and the initial mean temperature of the backfill body of the SABCHE-SHS, which has been in operation for ten years, change by no more than 0.13 °C and 0.68 °C respectively. In addition, the solar energy utilization rate of SABCHE-SHS reached 57.87 % to 65.59 %, which improved the efficiency and reliability of heat management.

{"title":"Evaluation of thermal efficiency of solar-assisted backfill coupled heat exchanger with seasonal heat storage system","authors":"Yujiao Zhao , Xueying Lu , Lang Liu , Bo Zhang , Rui Zhan , Mengyao Wang , Hailong Zhang , Dachuan Lu","doi":"10.1016/j.est.2025.115809","DOIUrl":"10.1016/j.est.2025.115809","url":null,"abstract":"<div><div>The swift consumption of non-renewable resources like fossil fuels underscores the importance of renewable energy development for the sake of long-term sustainability. The mining area is rich in solar and geothermal energy resources. This study introduces a solar-assisted backfill coupled heat exchanger system with a seasonal heat storage system (SABCHE-SHS) as a sustainable energy solution, which stores abundant solar energy in the pre-set mine backfill body, aiming to achieve heat storage in the backfill body during the non-heating period and heat extraction during the heating period. This study employed numerical simulation methods to compare the long-term performance of the SABCHE-SHS with that of the backfill coupled heat exchanger system (BCHE) relying solely on geothermal energy over a decade. The results show that the SABCHE-SHS had good heat storage and heat extraction performance, high outlet water temperature, and maintaining stable annual heat transfer efficiency under multi-cycle operation. By year ten, the SABCHE-SHS can provided higher heat storage and extraction rates of 747.34 W and 987.85 W, respectively, which are 286.34 W and 232.87 W higher than those of the BCHE. The initial outlet water temperature and the initial mean temperature of the backfill body of the SABCHE-SHS, which has been in operation for ten years, change by no more than 0.13 °C and 0.68 °C respectively. In addition, the solar energy utilization rate of SABCHE-SHS reached 57.87 % to 65.59 %, which improved the efficiency and reliability of heat management.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115809"},"PeriodicalIF":8.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing thermal management in a reversible solid oxide cell system utilizing thermal energy storage 利用热能储存加强可逆式固体氧化物电池系统的热管理

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-17 DOI: 10.1016/j.est.2025.115806

Javad Hosseinpour, Omid Babaie Rizvandi, Robert J. Braun

Reversible solid oxide cell (ReSOC) systems hold promise for providing cost-effective and efficient solutions for both long-duration and seasonal-energy storage applications. Endothermic processes in electrolysis mode using steam‑hydrogen chemistry require electrical heaters to supply high-grade thermal energy to sustain stack operating temperature, leading to decreased system efficiency. Both high- and low-grade thermal energy are needed in electrolytic operating modes. Thermal energy storage (TES) can be incorporated with stand-alone ReSOC systems to capture exothermic fuel cell waste heat and discharge it for endothermic electrolysis mode when "free" waste heat is not available. This study examines the economic and technological feasibility of integrating various TES approaches with a reversible system, such as two-tank energy storage, steam accumulator, phase-change heat exchangers, and packed-bed regenerator. The thermal energy from the exhaust gas is utilized to charge a TES medium in fuel cell mode, which is later discharged in electrolysis mode to improve the system round-trip efficiency (RTE) and reduce utility heating requirements. A physics-based ReSOC cell-stack model combined with balance-of-plant component models is utilized to assess overall system performance and levelized cost. A techno-economic analysis is conducted to evaluate the levelized cost of storage (LCOS) of the system. This study shows that given free waste heat, the system RTE can be improved by 14.4 % points from its stand-alone case value of 50.4 %, leading to an LCOS of 12.1 ¢/kWh by eliminating external heaters. In the absence of free waste heat, the results show that systems integrated with steam accumulators that enable low-grade TES achieve the highest RTE (57 %) and the lowest LCOS. The increase in RTE corresponds to a 6.6 % points improvement over systems not employing any TES, while the LCOS decreases slightly to 13.3 ¢/kWh. The study further indicates that integrating hardware for both high- and low-grade TES via packed beds and steam accumulators, respectively, increases the LCOS by 7 % points compared to systems without any TES.

{"title":"Enhancing thermal management in a reversible solid oxide cell system utilizing thermal energy storage","authors":"Javad Hosseinpour, Omid Babaie Rizvandi, Robert J. Braun","doi":"10.1016/j.est.2025.115806","DOIUrl":"10.1016/j.est.2025.115806","url":null,"abstract":"<div><div>Reversible solid oxide cell (ReSOC) systems hold promise for providing cost-effective and efficient solutions for both long-duration and seasonal-energy storage applications. Endothermic processes in electrolysis mode using steam‑hydrogen chemistry require electrical heaters to supply high-grade thermal energy to sustain stack operating temperature, leading to decreased system efficiency. Both high- and low-grade thermal energy are needed in electrolytic operating modes. Thermal energy storage (TES) can be incorporated with stand-alone ReSOC systems to capture exothermic fuel cell waste heat and discharge it for endothermic electrolysis mode when \"free\" waste heat is not available. This study examines the economic and technological feasibility of integrating various TES approaches with a reversible system, such as two-tank energy storage, steam accumulator, phase-change heat exchangers, and packed-bed regenerator. The thermal energy from the exhaust gas is utilized to charge a TES medium in fuel cell mode, which is later discharged in electrolysis mode to improve the system round-trip efficiency (RTE) and reduce utility heating requirements. A physics-based ReSOC cell-stack model combined with balance-of-plant component models is utilized to assess overall system performance and levelized cost. A techno-economic analysis is conducted to evaluate the levelized cost of storage (LCOS) of the system. This study shows that given free waste heat, the system RTE can be improved by 14.4 % points from its stand-alone case value of 50.4 %, leading to an LCOS of 12.1 ¢/kWh by eliminating external heaters. In the absence of free waste heat, the results show that systems integrated with steam accumulators that enable low-grade TES achieve the highest RTE (57 %) and the lowest LCOS. The increase in RTE corresponds to a 6.6 % points improvement over systems not employing any TES, while the LCOS decreases slightly to 13.3 ¢/kWh. The study further indicates that integrating hardware for both high- and low-grade TES via packed beds and steam accumulators, respectively, increases the LCOS by 7 % points compared to systems without any TES.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115806"},"PeriodicalIF":8.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards net-zero carbon cooling: A comprehensive study on PCM-integrated condenser and green hydrogen power supply in air conditioning systems

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-15 DOI: 10.1016/j.est.2025.115790

Mohamed Nasser , M. Al-Dossari , N.S. Abd EL-Gawaad , M. Ismail

This study addresses the critical need for improved efficiency and sustainability in air conditioning (AC) systems, particularly in hot climates where cooling demand and carbon emissions are high. To this end, the research evaluates three distinct cases: Case I involves an AC unit operating solely on grid electricity, highlighting the substantial energy consumption associated with high ambient temperatures. Case II examines the same AC unit but integrates a phase change material (PCM) with the condenser, effectively reducing energy consumption by lowering the condenser temperature, resulting in a notable decrease in compressor energy use and extending its operational lifespan. The study found that this integration leads to a cooling load and power consumption reduction of 5.72 % and 9.46 % in hot conditions and 19.54 % and 21.71 % in moderate climates, respectively, with an average improvement in the coefficient of performance (COP) ranging from 3.5 % to 5.88 %. Finally, Case III explores a standalone AC unit powered by a green hydrogen system, also incorporating PCM, which facilitates energy self-dependency by effectively storing winter electricity for summer use. The findings underscore the potential of integrating renewable energy sources and advanced materials like PCM to significantly enhance AC system performance, reduce power consumption, and guide the development of next-generation, low-emission cooling technologies suitable for various climatic conditions. This work contributes valuable insights into sustainable cooling solutions that can mitigate environmental impacts while meeting increasing energy demands.

{"title":"Towards net-zero carbon cooling: A comprehensive study on PCM-integrated condenser and green hydrogen power supply in air conditioning systems","authors":"Mohamed Nasser , M. Al-Dossari , N.S. Abd EL-Gawaad , M. Ismail","doi":"10.1016/j.est.2025.115790","DOIUrl":"10.1016/j.est.2025.115790","url":null,"abstract":"<div><div>This study addresses the critical need for improved efficiency and sustainability in air conditioning (AC) systems, particularly in hot climates where cooling demand and carbon emissions are high. To this end, the research evaluates three distinct cases: Case I involves an AC unit operating solely on grid electricity, highlighting the substantial energy consumption associated with high ambient temperatures. Case II examines the same AC unit but integrates a phase change material (PCM) with the condenser, effectively reducing energy consumption by lowering the condenser temperature, resulting in a notable decrease in compressor energy use and extending its operational lifespan. The study found that this integration leads to a cooling load and power consumption reduction of 5.72 % and 9.46 % in hot conditions and 19.54 % and 21.71 % in moderate climates, respectively, with an average improvement in the coefficient of performance (COP) ranging from 3.5 % to 5.88 %. Finally, Case III explores a standalone AC unit powered by a green hydrogen system, also incorporating PCM, which facilitates energy self-dependency by effectively storing winter electricity for summer use. The findings underscore the potential of integrating renewable energy sources and advanced materials like PCM to significantly enhance AC system performance, reduce power consumption, and guide the development of next-generation, low-emission cooling technologies suitable for various climatic conditions. This work contributes valuable insights into sustainable cooling solutions that can mitigate environmental impacts while meeting increasing energy demands.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115790"},"PeriodicalIF":8.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sodium ion intercalated NH4V4O10 with adjustable interlayer-spacing as an advanced cathode for aqueous zinc ion battery

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-15 DOI: 10.1016/j.est.2025.115825

Ying Sha, Jianshu Wang, Zhihao Sun, Zihao Guo, Jingyu Bi, Hao Wang, Chaoxuan Wang, Zeqi Liu, Lei Qian

Ammonium vanadate has increasingly been the focus of attention in the field of aqueous zinc ion battery due to its high theoretical specific capacity. However, they suffer from slow kinetics and loss of capacity due to irreversible deamidation. Herein, we fabricated a series of Na⁺-intercalating NH₄V₄O₁₀ (SNVO) with lamellar structure via a simple one-step hydrothermal method, in which SNVO30 exhibited high capacity and satisfactory rate performance in the storage process for Zn²⁺. Sodium alginate had a role in the modulation of microstructures during the synthesis, which improved the contact area between the cathode and the electrolyte. It was found that Na⁺ increased the interlayer spacing, and served as a “pillar” between the VO layers to reinforce the SNVO during the cycling process, thereby enhancing its stability and accelerating reaction kinetics. The generation of additional oxygen vacancies facilitated an alteration in the electronic structure and enhanced the Zn²⁺ diffusion capacity. Specifically, the SNVO30 exhibited high initial specific capacity of 447.2 mAh g⁻¹ at 2.0 A g⁻¹. And a specific capacity of 228.3 mAh g⁻¹ was maintained after 1500 cycles at 10 A g⁻¹. This work provides a reference for the development of high-performance aqueous zinc ion battery cathode materials.

{"title":"Sodium ion intercalated NH4V4O10 with adjustable interlayer-spacing as an advanced cathode for aqueous zinc ion battery","authors":"Ying Sha, Jianshu Wang, Zhihao Sun, Zihao Guo, Jingyu Bi, Hao Wang, Chaoxuan Wang, Zeqi Liu, Lei Qian","doi":"10.1016/j.est.2025.115825","DOIUrl":"10.1016/j.est.2025.115825","url":null,"abstract":"<div><div>Ammonium vanadate has increasingly been the focus of attention in the field of aqueous zinc ion battery due to its high theoretical specific capacity. However, they suffer from slow kinetics and loss of capacity due to irreversible deamidation. Herein, we fabricated a series of Na<sup>+</sup>-intercalating NH<sub>4</sub>V<sub>4</sub>O<sub>10</sub> (SNVO) with lamellar structure via a simple one-step hydrothermal method, in which SNVO30 exhibited high capacity and satisfactory rate performance in the storage process for Zn<sup>2+</sup>. Sodium alginate had a role in the modulation of microstructures during the synthesis, which improved the contact area between the cathode and the electrolyte. It was found that Na<sup>+</sup> increased the interlayer spacing, and served as a “pillar” between the V<img>O layers to reinforce the SNVO during the cycling process, thereby enhancing its stability and accelerating reaction kinetics. The generation of additional oxygen vacancies facilitated an alteration in the electronic structure and enhanced the Zn<sup>2+</sup> diffusion capacity. Specifically, the SNVO30 exhibited high initial specific capacity of 447.2 mAh g<sup>−1</sup> at 2.0 A g<sup>−1</sup>. And a specific capacity of 228.3 mAh g<sup>−1</sup> was maintained after 1500 cycles at 10 A g<sup>−1</sup>. This work provides a reference for the development of high-performance aqueous zinc ion battery cathode materials.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115825"},"PeriodicalIF":8.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the development mechanism of thermocline in long-term water pit heat storage

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-15 DOI: 10.1016/j.est.2025.115834

Jianchuan Yang , Lin Fu , Bo Yang

Under the dual‑carbon background, utilizing seasonal heat storage to fully recover the year-round waste heat from power plants and process industries is expected to lead to a low-cost and low-carbon heat supply technology path. Although seasonal heat storage has been successfully applied in some countries such as Denmark, Germany, China, etc., there is still a lack of detailed and in-depth research on the characteristics of the thermocline for the long-term heat storage, especially for such a small height-to-diameter ratio heat storage with limited size in the vertical direction but large enough size in the horizontal direction. In this paper, heat storage experiments were carried out to obtain the dynamic temperature distribution data, which were compared with the CFD simulation results to verify the reliability of the CFD simulation. On this basis, more simulations were carried out for a full-size large-scale heat storage. The generation and development mechanisms of thermocline were revealed. The vorticity field and temperature field were analyzed and discussed, and it was found that vortices could still be formed inside the heat storage at a very low inlet flow velocity (e.g., 0.015 m/s). Vortices were the main cause of the thickening of the thermocline compared to the ideal plug flow, contributing over 80 % to the thermocline. This paper is hopeful to provide support for assessing the heat grade loss in the heat storage, present a reference of the design of disc distributor and give the improvement methods to decrease thickness of the thermocline.

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引用次数: 0

A review of salt mechanical behavior, stability and site selection of underground hydrogen storage in salt cavern-Moroccan case 盐洞中的盐力学行为、稳定性和地下储氢选址综述--摩洛哥案例

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-15 DOI: 10.1016/j.est.2025.115813

Ibtihal El Aichouni , Abdelaziz Mridekh , Nouhaila Nabil , Samir Rachidi , Hanane El Hamraoui , Bouabid El Mansouri , Achraf Essalih

In the context of climate change and the importance of reducing the dependence on fossil fuels, salt caverns are considered an optimize solution to store hydrogen underground thanks to its large storage capacity, high withdrawal rate and cost effectiveness. However, hydrogen storage technology utilizing underground facilities is still in its early stages. In order to establish the state of the art, this review article seeks to define, characterize, and sum up the key components of this technology, including the behavior of rock salt, the formation of salt caverns, stability assessment and associated risks. A synthesis of the mechanical behavior of rock salt is conducted, alongside analytical and simulation-based approaches to underground hydrogen storage. Challenges to achieving safe and efficient geological hydrogen storage are discussed, with clarification of suitable site selection criteria, as they play a crucial role in the effective storage operation, as well as an economic analysis inspired from different studies. Finally, the identification of Moroccan salt deposits for potential hydrogen storage site is discussed.

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引用次数: 0

Zero-emission chemical sites – combining power purchase agreements with thermal energy storage

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2025-02-15 DOI: 10.1016/j.est.2025.115667

Marco Prenzel , Freerk Klasing , Stefan Kirschbaum , Thomas Bauer

The chemical industry is adopting increasingly ambitious greenhouse gas emission targets. This work examines the decarbonization concept of a chemical site utility system based on renewable power purchase agreements and green hydrogen. To this end, a model of a zero-emission utility system including all typical components, demand profiles and energy prices was developed. The model was used to investigate the effect of flexibility options such as curtailment, power-to-heat and thermal energy storage by means of energy system optimization. Sensitivity studies were carried out with respect to the green hydrogen price, thermal energy storage investment costs and on-site steam turbine capacity to gain a deeper understanding of the various influencing factors. Thermal energy storage, e.g. molten salt technology, can achieve cost savings up to 27 % through efficient integration of renewable electricity from PV and wind. Furthermore, the concept with thermal energy storage proved to be more resilient to variations in the green hydrogen price. In the best-case scenario, a 30 % higher green hydrogen price only results in a 6 % increase in annual expenditures. Even when very high investment costs are assumed, thermal energy storage still remains an integral component of the cost-optimal zero-emission utility system.

{"title":"Zero-emission chemical sites – combining power purchase agreements with thermal energy storage","authors":"Marco Prenzel , Freerk Klasing , Stefan Kirschbaum , Thomas Bauer","doi":"10.1016/j.est.2025.115667","DOIUrl":"10.1016/j.est.2025.115667","url":null,"abstract":"<div><div>The chemical industry is adopting increasingly ambitious greenhouse gas emission targets. This work examines the decarbonization concept of a chemical site utility system based on renewable power purchase agreements and green hydrogen. To this end, a model of a zero-emission utility system including all typical components, demand profiles and energy prices was developed. The model was used to investigate the effect of flexibility options such as curtailment, power-to-heat and thermal energy storage by means of energy system optimization. Sensitivity studies were carried out with respect to the green hydrogen price, thermal energy storage investment costs and on-site steam turbine capacity to gain a deeper understanding of the various influencing factors. Thermal energy storage, e.g. molten salt technology, can achieve cost savings up to 27 % through efficient integration of renewable electricity from PV and wind. Furthermore, the concept with thermal energy storage proved to be more resilient to variations in the green hydrogen price. In the best-case scenario, a 30 % higher green hydrogen price only results in a 6 % increase in annual expenditures. Even when very high investment costs are assumed, thermal energy storage still remains an integral component of the cost-optimal zero-emission utility system.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115667"},"PeriodicalIF":8.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0